CN109649867A - Polypropylene product degassing cabin upside-down construction technique - Google Patents
Polypropylene product degassing cabin upside-down construction technique Download PDFInfo
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- CN109649867A CN109649867A CN201811433749.XA CN201811433749A CN109649867A CN 109649867 A CN109649867 A CN 109649867A CN 201811433749 A CN201811433749 A CN 201811433749A CN 109649867 A CN109649867 A CN 109649867A
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- degassing cabin
- lower section
- degassing
- cabin
- construction
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Polypropylene product degassing cabin upside-down construction technique of the present invention; docking lifting technique is fixed and drawn high upwards by sectional vertical lifting, lower section; major diameter arc board group is to, welding quality control technology; " slope protection " method plant bottom case grouting technique; equipment inner wall is movable to hang platform construction technology; the construction technologies such as the protection of inside and outside wall apparatus body and measure of starting to exchange fire; ensure product degassing cabin it is long-term, efficiently, stable operation while; be conducive to improve project management level, save cost, lifting construction efficiency, shorten construction period, it is ensured that construction quality.
Description
Technical field
The invention belongs to technical field of building construction, and in particular to a kind of polypropylene product degassing cabin upside-down construction work
Skill.
Background technique
Product degassing cabin is a large scale equipment in Polypropylene Project, is the chief component of powder deactivation unit.Add
Nitrogen after heat enters from degassing cabin bottom parallel works, uniformly diffuses through entire powder layer, by connecing with the reverse of powder
Touching blows out the hydro carbons in powder, and then nitrogen and the hydro carbons of entrainment enter hydro carbons recovery system, and the hydro carbons circulation of recycling makes
With.
400,000 tons/year of polypropylene plants of existing XX good fortune base propane comprehensive utilization of resources project, product degassing cabin is mounted on poly-
Unit degassing cabin frame 44.800m, equipment gross weight 124T, overall length 39.835m, material S30403, operating pressure 0.024MPa are closed,
0.35 MPa of gas-tight test pressure, 70 DEG C of operating temperature, working media polypropylene powder.Product degassing cabin due to transportation reasons,
The practical arrival in scene is divided into two sections, and wherein upper semisection outer dimension is 11.115m long, diameter 6.5m, net weight 63T, outside lower semisection
For shape having a size of 29.720m long, diameter 4.4m, net weight 61T, lifting construction is difficult.
Summary of the invention
To solve the above problems, the invention discloses polypropylene product degassing cabin upside-down construction technique, segmental hoisting,
Ensure product degassing cabin it is long-term, efficiently, stable operation while, improve project management level, save cost, lifting construction effect
Rate shortens construction period, it is ensured that construction quality.
In order to achieve the above objectives, technical scheme is as follows:
Polypropylene product degassing cabin upside-down construction technique, it is characterised in that: the following steps are included:
(1) process pipe for placing 8m high vertically in polymerized unit degassing cabin frame is put in absolute altitude Equipment Foundations centre bit
Plummet is set, guarantees that pipeline center is consistent with equipment center using plummet, while pipeline centering is guaranteed that upper surface is smooth；
(2) degassing cabin lower section is first lifted, stops falling when the bottom centrum flange port of degassing cabin lower section is apart from ground 8m, make
The lifting lug of gas storehouse lower section is pulled with 4 electric block symmetrical inclineds, promotes electric block, the strength of suspension hook is transferred to electric block
Master is hung wirerope again afterwards to shed, adjusts 4 electric blocks, makes the smooth pipe for being placed on process pipe of cone flange face of lower section
On mouth iron plate, flange face does not stress；
(3) before lifting degassing cabin upper section, dismountable movable platform, lower half are made using angle steel according to the size of degassing cabin lower section
After section is fixed, dismountable movable platform is installed in degassing cabin lower section inner upper, and movable platform is bundled in " rice " word branch
In support, while " rice " word is supported and fixed on degassing cabin lower section inner wall；
(4) before degassing cabin upper section is in place, 6cm slope protection is built up on the inside of secondary grout layer using cement mortar, then by degassing cabin
The skirt support area of upper section is placed on support inclined sizing block；
(5) lifting of degassing cabin upper section is in place, using inclined sizing block by its levelling capturing；
(6) it forms a team up and down: degassing cabin lower section is promoted by electric block, after upper and lower section unfitness of butt joint is met the requirements, carry out inside and outside
Start to weld after wall device main body protection and measure of starting to exchange fire；
(7) " rice " the word support in degassing cabin is removed, and is released using hoist engine from cone flange port；
(8) weld seam, support zone are ground using Carborundum wheel, remove burr, the welding bead reinforcement, overlap on surface, then make
It is thrown with wool wheel essence to design requirement；
(9) gas pressure test is carried out；
(10) degassing cabin is kept the temperature according to design requirement after the completion of gas pressure test.
Further, step (6) promotes degassing cabin lower section by electric block, when degassing cabin lower section does not stop to be up promoted to
When on the inside of two grooves at a distance of 0.5cm, if there is inner wall misalignment phenomenon, one piece of support of welding in the support of lower semisection " rice " word
Part carries out symmetrical local directed complete set to degassing cabin upper section with 2 screw jack, when unfitness of butt joint is met the requirements, at adjustment
Wall is fixed using stainless steel shoe；After the completion of adjustment, then inner wall is checked, after unfitness of butt joint is all satisfied requirement, is carried out inside and outside
Start to weld after wall device main body protection and measure of starting to exchange fire.
Further, welding described in step (6) refers to 4-8 welders while symmetrical, discontinuity carries out argon arc welding and takes
Basic skill or training makees, and E308-16 welding rod is recycled to be filled capping.
Further, before step (6) welding in group to applying lime wash on the following inside and outside wall of weld seam, and will using fire blanket
Lid is filled out in detachable movable platform surrounding gap, while building extraordinary maintenance frame in degassing cabin surrounding.
Further, step (9) carries out first closing exhaust outlet when gas pressure test, opens intake valve, presses " pressure testing curve
Figure " rises pressure slowly, when pressure rises to 0.035 MPa, pressure maintaining 10 minutes, then to butt weld and connecting portion into
The first leakage of row checks, boosts to 0.175MPa after qualified, such as without exception, gradually rises by every grade for the differential of 0.035MPa thereafter
To 0.35MPa, pressure maintaining 30 minutes, are checked under test pressure；It is down to 0.3045MPa after qualification, and keeps 20-30h again
It is secondary to carry out leakage inspection, exhaust valve is opened after qualified, is depressurized to zero-bit.
The beneficial effects of the present invention are:
Polypropylene product degassing cabin upside-down construction technique of the present invention, is lifted by sectional vertical, until upper semisection faces
When fix, then lower semisection up is fallen to draw, butt welding circumferential weld and welding quality control technology, " slope protection " method plant bottom case
Grouting technique, equipment inner wall is movable to hang platform construction technology, and inside and outside wall apparatus body is protected and the construction technologies such as measure of starting to exchange fire,
Ensure product degassing cabin it is long-term, efficiently, stable operation while, be conducive to improve project management level, save cost, promoted
Construction efficiency shortens construction period, it is ensured that construction quality.
Detailed description of the invention
Fig. 1 is installation procedure figure of the invention.
Fig. 2 is degassing cabin lower section erection drawing of the present invention.
Fig. 3 is movable platform schematic diagram of the present invention.
Fig. 4 is slope protection schematic diagram of the present invention.
Fig. 5 is group to measure schematic diagram.
Fig. 6 is gas pressure test curve graph.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.
1, product degassing cabin lower semisection lifts
According to the detail parameters of field device, main hang selects 31 heavy industry 500T crawler crane (SCC5000A) FJ90m principal arms, 12m
Fixed auxiliary operating condition, tail of sauntering select 220T truck crane, lower semisection lifting in completion, as shown in Figure 1.
Lower semisection is first carried out to fix
In cone flange port with 24 cun of 8m long of lower portion placement of process pipe before lower semisection lifting, in 44.800m absolute altitude equipment
Plummet is placed in base center position, guarantees that pipeline center is consistent with equipment center using plummet, while will be in the guarantee of pipeline centering
Surfacing.The slow fallen downward of product degassing cabin is kept in hoisting process, when lower semisection cone flange port is apart from the left side ground 8m
Stop continuing to fall (stopping when namely just having come to process pipe) when right, pulls down half using 4 20T electric block symmetrical inclineds
The lifting lug of section, slowly promotes electric block, and the strength of suspension hook, which is transferred to after electric block, which main will hang wirerope again, sheds, slowly
Slowly 4 electric blocks of adjustment, on the iron plate being placed on interim process pipe for keeping centrum flange face smooth, flange face can not be by
Power.
Section steel manufacture temporary spacing can be used in the middle part of degassing cabin lower semisection, prevent lower semisection from swinging, cause cone method
It is deformed after blue face discontinuity.
2. making dismountable movable platform after product degassing cabin lower semisection is fixed using angle steel to pacify inside degassing cabin
Movable platform is filled, and movable platform is bundled in the support of " rice " word, while by " rice " word bracing reinforcement, being made using angle steel
Distachable platform can it is safer, more easily implementation group to, welding, polishing etc. a series of constructions.
3, " slope protection " method grouting prepares
Because degassing cabin upper semisection outer wall is spaced closely together with device framework, secondary grout layer inner side template is difficult supporting, if mentioned
Preceding supporting can damage again because equipment adjusts, therefore before degassing cabin upper section is in place using cement mortar on the inside of secondary grout layer
The concrete " slope protection " of 6cm or so is built up, as shown in figure 4, before slope protection does not solidify, by the equipment support of degassing cabin side
" sitting paddle " is placed on support inclined sizing block, last foundation bolt connection, such simple and practical in structure, easy for construction, and
Slope protection after solidification can prevent concrete excessive, can effectively avoid inner side template from damaging hollow caused by spillage, while energy
Pollution of the high strength grout to equipment surface is prevented well.It is to be noted that the weight of the upper semisection of degassing cabin passes through
Equipment support is all pressed on parallels, and degassing cabin upper semisection is that no weight pushes down lower semisection.
4, the lifting of degassing cabin upper semisection in place, using inclined sizing block by its levelling capturing.
5, welding
Slowly promote lower semisection by electric block, in lifting process the moment guarantee centrum flange port and temporary pipeline upper surface away from
From consistent, it can tentatively guarantee the verticality of equipment entirety in this way.
When group to weld seam mutually from 5cm when, first with steel square check degassing cabin inner wall unfitness of butt joint, and pass through electronic calabash
Reed adjustment, as far as possible control unfitness of butt joint.
When lower semisection does not stop to be up promoted on the inside of two grooves at a distance of 0.5cm, if there is inner wall misalignment phenomenon, under
One piece of supporting element is welded in half section of " rice " word support, symmetrical local directed complete set is carried out to upper semisection using 2 20T screw jack,
When unfitness of butt joint is met the requirements, inner wall at adjustment is fixed using stainless steel shoe, as shown in Figure 5.
After the completion of adjustment, then inner wall is checked, after unfitness of butt joint is all satisfied requirement, the 4-8 welderings with corresponding qualification
Work is symmetrical simultaneously, discontinuity carries out argon arc welding bottoming work, and E308-16 welding rod is recycled to be filled the work such as capping.
In group to applying lime wash on the following inside and outside wall of weld seam before welding, and using fire blanket by detachable movable platform four
Lid is filled out in all gaps, can effectively prevent welding spark to the damage of equipment inner wall burnishing surface in this way, accomplish to apparatus body at
Product protection.Extraordinary maintenance is built in degassing cabin surrounding simultaneously, prevents the influence of external environment welding quality.
6, subsequent construction
" rice " the word support in degassing cabin is removed, and is released using hoist engine from cone flange port.
It is ground using the position that the Carborundum wheel of 80 ~ 120 mesh polishes the needs such as weld seam, support, removes surface
Burr, welding bead reinforcement, overlap etc. reuse wool wheel essence and throw to design requirement.
7, exhaust outlet is closed when gas pressure test, opens intake valve, slowly increase pressure by " pressure testing curve graph ", is pressed
When " pressure testing curve graph " rises to 0.035 MPa, pressure maintaining 10 minutes, then butt weld and connecting portion are carried out first
Leakage checks, slowly boosts to 0.175MPa after qualified, such as without exception, is gradually increased to by every grade for the differential of 0.035MPa thereafter
0.35MPa, pressure maintaining 30 minutes, are checked under test pressure.When being down to 0.3045MPa after qualification, and keeping sufficiently long
Between carry out leakage inspection again, open exhaust valve after qualified, be slowly depressured, until zero-bit.
8, degassing cabin is kept the temperature according to design requirement after the completion of gas pressure test.
Polypropylene product degassing cabin upside-down construction technique of the present invention when degassing cabin lower semisection is fixed, don't incite somebody to action
It is integrally placed on temporary support process pipe, it should allow electric block to bear its gravity, can effectively avoid cone flange port
Stress is excessive and causes the damage of equipment.
First the inner wall perimeter of upper lower semisection commissure is checked before degassing cabin lifting, it is inconsistent effectively to evade perimeter
Caused to organize pair, a series of problems, such as misalignment is excessive, early discovery is early to be solved.
Wanted when welding strict guarantee simultaneously, symmetrically, intermittent sequence of construction, fixed baffle should not be removed in welding process,
Welding deformation can be reduced well in this way.
Because the requirement of degassing cabin smoothness of inner wall is very high, therefore the measure of starting to exchange fire centainly is carried out in welding, prevents welding spark
Splashing, which is attached on equipment inner wall, damages original burnishing surface, causes secondary do over again.
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution consisting of any combination of the above technical features.
Claims (5)
1. polypropylene product degassing cabin upside-down construction technique, it is characterised in that: the following steps are included:
(1) process pipe for placing 8m high vertically in polymerized unit degassing cabin frame is put in absolute altitude Equipment Foundations centre bit
Plummet is set, guarantees that pipeline center is consistent with equipment center using plummet, while pipeline centering is guaranteed that upper surface is smooth；
(2) degassing cabin lower section is first lifted, stops falling when the bottom centrum flange port of degassing cabin lower section is apart from ground 8m, make
The lifting lug of gas storehouse lower section is pulled with 4 electric block symmetrical inclineds, promotes electric block, the strength of suspension hook is transferred to electric block
Master is hung wirerope again afterwards to shed, adjusts 4 electric blocks, makes the smooth pipe for being placed on process pipe of cone flange face of lower section
On mouth iron plate, flange face does not stress；
(3) before lifting degassing cabin upper section, dismountable movable platform, lower half are made using angle steel according to the size of degassing cabin lower section
After section is fixed, dismountable movable platform is installed in degassing cabin lower section inner upper, and movable platform is bundled in " rice " word branch
In support, while " rice " word is supported and fixed on degassing cabin lower section inner wall；
(4) before degassing cabin upper section is in place, 6cm slope protection is built up on the inside of secondary grout layer using cement mortar, then by degassing cabin
The skirt support area of upper section is placed on support inclined sizing block；
(5) lifting of degassing cabin upper section is in place, using inclined sizing block by its levelling capturing；
(6) it forms a team up and down: degassing cabin lower section is promoted by electric block, after upper and lower section unfitness of butt joint is met the requirements, carry out inside and outside
Start to weld after wall device main body protection and measure of starting to exchange fire；
(7) " rice " the word support in degassing cabin is removed, and is released using hoist engine from cone flange port；
(8) weld seam, support zone are ground using Carborundum wheel, remove burr, the welding bead reinforcement, overlap on surface, then make
It is thrown with wool wheel essence to design requirement；
(9) gas pressure test is carried out；
(10) degassing cabin is kept the temperature according to design requirement after the completion of gas pressure test.
2. polypropylene product degassing cabin upside-down construction technique according to claim 1, it is characterised in that: step (6) is logical
It crosses electric block and promotes degassing cabin lower section, when degassing cabin lower section does not stop to be up promoted on the inside of two grooves at a distance of 0.5cm, if going out
When existing inner wall misalignment phenomenon, one piece of supporting element is welded in the support of lower semisection " rice " word, with 2 screw jack on degassing cabin
The symmetrical local directed complete set of Duan Jinhang is fixed inner wall at adjustment using stainless steel shoe when unfitness of butt joint is met the requirements；Adjustment is completed
Afterwards, then to inner wall it checks, after unfitness of butt joint is all satisfied requirement, starts after carrying out the protection of inside and outside wall apparatus body and measure of starting to exchange fire
Welding.
3. polypropylene product degassing cabin upside-down construction technique according to claim 1, it is characterised in that: step (6) institute
The welding stated refers to that 4-8 welders are symmetrical simultaneously, discontinuity carries out argon arc welding bottoming work, recycle E308-16 welding rod into
Row filling capping.
4. polypropylene product degassing cabin upside-down construction technique according to claim 1, it is characterised in that: step (6) weldering
In group to applying lime wash on the following inside and outside wall of weld seam before connecing, and detachable movable platform surrounding gap is filled out using fire blanket
Lid, while extraordinary maintenance frame is built in degassing cabin surrounding.
5. polypropylene product degassing cabin upside-down construction technique according to claim 1, it is characterised in that: step (9) into
Exhaust outlet is first closed when row gas pressure test, opens intake valve, slowly increase pressure by " pressure testing curve graph ", pressure rises
When to 0.035 MPa, pressure maintaining 10 minutes, first leakage then is carried out to butt weld and connecting portion and is checked, is boosted after qualified
It is such as without exception to 0.175MPa, it is gradually increased to 0.35MPa for the differential of 0.035MPa by every grade thereafter, is protected under test pressure
Pressure 30 minutes, is checked；It is down to 0.3045MPa after qualification, and 20-30h is kept to carry out leakage inspection again, is opened after qualified
Exhaust valve is depressurized to zero-bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811433749.XA CN109649867A (en) | 2018-11-28 | 2018-11-28 | Polypropylene product degassing cabin upside-down construction technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811433749.XA CN109649867A (en) | 2018-11-28 | 2018-11-28 | Polypropylene product degassing cabin upside-down construction technique |
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| Publication Number | Publication Date |
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| CN109649867A true CN109649867A (en) | 2019-04-19 |
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| CN201811433749.XA Pending CN109649867A (en) | 2018-11-28 | 2018-11-28 | Polypropylene product degassing cabin upside-down construction technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110900021A (en) * | 2019-11-28 | 2020-03-24 | 中国化学工程第三建设有限公司 | Reactor assembly welding method in narrow space of dehydrogenation device frame |
| CN115263062A (en) * | 2022-09-28 | 2022-11-01 | 中化二建集团有限公司 | Flange assembly type aluminum-magnesium stock bin construction method |
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| CN1696043A (en) * | 2005-05-26 | 2005-11-16 | 内蒙古自治区第三电力建设工程有限责任公司 | Construction technique for hoisting steel made coal hopper on-site |
| CN103273281A (en) * | 2013-06-20 | 2013-09-04 | 中航虹波风电设备有限公司 | Construction technology for thin-wall barrel bodies |
| CN104033878A (en) * | 2014-05-29 | 2014-09-10 | 中国五冶集团有限公司 | Boiler steel frame combination and installation process of sintering machine circular cooler |
| CN104089088A (en) * | 2014-06-30 | 2014-10-08 | 成都高普石油工程技术有限公司 | Installation method for pipeline with annual polypropylene conveying capacity being thirty thousand tons |
| CN104420694A (en) * | 2013-08-21 | 2015-03-18 | 五冶集团上海有限公司 | General mounting method for benzene hydrogenation engineering tower equipment |
| CN105781205A (en) * | 2015-11-30 | 2016-07-20 | 中国化学工程第三建设有限公司 | In-place guiding device for segmented hoisting and air pairing of heavy tower equipment |
| CN108644469A (en) * | 2018-05-22 | 2018-10-12 | 山西省工业设备安装集团有限公司 | The construction technology of main steam system pipeline in a kind of Steam Turbine |
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2018
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|---|---|---|---|---|
| CN1696043A (en) * | 2005-05-26 | 2005-11-16 | 内蒙古自治区第三电力建设工程有限责任公司 | Construction technique for hoisting steel made coal hopper on-site |
| CN103273281A (en) * | 2013-06-20 | 2013-09-04 | 中航虹波风电设备有限公司 | Construction technology for thin-wall barrel bodies |
| CN104420694A (en) * | 2013-08-21 | 2015-03-18 | 五冶集团上海有限公司 | General mounting method for benzene hydrogenation engineering tower equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110900021A (en) * | 2019-11-28 | 2020-03-24 | 中国化学工程第三建设有限公司 | Reactor assembly welding method in narrow space of dehydrogenation device frame |
| CN115263062A (en) * | 2022-09-28 | 2022-11-01 | 中化二建集团有限公司 | Flange assembly type aluminum-magnesium stock bin construction method |
| CN115263062B (en) * | 2022-09-28 | 2023-01-31 | 中化二建集团有限公司 | Flange assembly type aluminum-magnesium stock bin construction method |
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